/**
 * Parse the time to string
 * @param {(Object|string|number)} time
 * @param {string} cFormat
 * @returns {string | null}
 */
export function parseTime (time, cFormat) {
  if (arguments.length === 0 || !time) {
    return null
  }
  const format = cFormat || '{y}-{m}-{d} {h}:{i}:{s}'
  let date
  if (typeof time === 'object') {
    date = time
  } else {
    if ((typeof time === 'string')) {
      if ((/^[0-9]+$/.test(time))) {
        // support "1548221490638"
        time = parseInt(time)
      } else {
        // support safari
        // https://stackoverflow.com/questions/4310953/invalid-date-in-safari
        time = time.replace(new RegExp(/-/gm), '/')
      }
    }

    if ((typeof time === 'number') && (time.toString().length === 10)) {
      time = time * 1000
    }
    date = new Date(time)
  }
  const formatObj = {
    y: date.getFullYear(),
    m: date.getMonth() + 1,
    d: date.getDate(),
    h: date.getHours(),
    i: date.getMinutes(),
    s: date.getSeconds(),
    a: date.getDay()
  }
  const timeStr = format.replace(/{([ymdhisa])+}/g, (result, key) => {
    const value = formatObj[key]
    // Note: getDay() returns 0 on Sunday
    if (key === 'a') {
      return ['日', '一', '二', '三', '四', '五', '六'][value]
    }
    return value.toString().padStart(2, '0')
  })

  return timeStr
}

/**
 * @param {number} time
 * @param {string} option
 * @returns {string}
 */
export function formatTime (time, option) {
  if (('' + time).length === 10) {
    time = parseInt(time) * 1000
  } else {
    time = +time
  }
  const d = new Date(time)
  const now = Date.now()

  const diff = (now - d) / 1000

  if (diff < 30) {
    return '刚刚'
  } else if (diff < 3600) {
    // less 1 hour
    return Math.ceil(diff / 60) + '分钟前'
  } else if (diff < 3600 * 24) {
    return Math.ceil(diff / 3600) + '小时前'
  } else if (diff < 3600 * 24 * 2) {
    return '1天前'
  }
  if (option) {
    return parseTime(time, option)
  } else {
    return (
      d.getMonth() +
      1 +
      '月' +
      d.getDate() +
      '日' +
      d.getHours() +
      '时' +
      d.getMinutes() +
      '分'
    )
  }
}

/**
 * @param {string} url
 * @returns {Object}
 */
export function getQueryObject (url) {
  url = url == null ? window.location.href : url
  const search = url.substring(url.lastIndexOf('?') + 1)
  const obj = {}
  const reg = /([^?&=]+)=([^?&=]*)/g
  search.replace(reg, (rs, $1, $2) => {
    const name = decodeURIComponent($1)
    let val = decodeURIComponent($2)
    val = String(val)
    obj[name] = val
    return rs
  })
  return obj
}

/**
 * @param {string} input value
 * @returns {number} output value
 */
export function byteLength (str) {
  // returns the byte length of an utf8 string
  let s = str.length
  for (var i = str.length - 1; i >= 0; i--) {
    const code = str.charCodeAt(i)
    if (code > 0x7f && code <= 0x7ff) s++
    else if (code > 0x7ff && code <= 0xffff) s += 2
    if (code >= 0xDC00 && code <= 0xDFFF) i--
  }
  return s
}

/**
 * @param {Array} actual
 * @returns {Array}
 */
export function cleanArray (actual) {
  const newArray = []
  for (let i = 0; i < actual.length; i++) {
    if (actual[i]) {
      newArray.push(actual[i])
    }
  }
  return newArray
}

/**
 * @param {Object} json
 * @returns {Array}
 */
export function param (json) {
  if (!json) return ''
  return cleanArray(
    Object.keys(json).map(key => {
      if (json[key] === undefined) return ''
      return encodeURIComponent(key) + '=' + encodeURIComponent(json[key])
    })
  ).join('&')
}

/**
 * @param {string} url
 * @returns {Object}
 */
export function param2Obj (url) {
  const search = decodeURIComponent(url.split('?')[1]).replace(/\+/g, ' ')
  if (!search) {
    return {}
  }
  const obj = {}
  const searchArr = search.split('&')
  searchArr.forEach(v => {
    const index = v.indexOf('=')
    if (index !== -1) {
      const name = v.substring(0, index)
      const val = v.substring(index + 1, v.length)
      obj[name] = val
    }
  })
  return obj
}

/**
 * @param {string} val
 * @returns {string}
 */
export function html2Text (val) {
  const div = document.createElement('div')
  div.innerHTML = val
  return div.textContent || div.innerText
}

/**
 * Merges two objects, giving the last one precedence
 * @param {Object} target
 * @param {(Object|Array)} source
 * @returns {Object}
 */
export function objectMerge (target, source) {
  if (typeof target !== 'object') {
    target = {}
  }
  if (Array.isArray(source)) {
    return source.slice()
  }
  Object.keys(source).forEach(property => {
    const sourceProperty = source[property]
    if (typeof sourceProperty === 'object') {
      target[property] = objectMerge(target[property], sourceProperty)
    } else {
      target[property] = sourceProperty
    }
  })
  return target
}

/**
 * @param {string} type
 * @returns {Date}
 */
export function getTime (type) {
  if (type === 'start') {
    return new Date().getTime() - 3600 * 1000 * 24 * 90
  } else {
    return new Date(new Date().toDateString())
  }
}

/**
 * @param {Function} func
 * @param {number} wait
 * @param {boolean} immediate
 * @return {*}
 */
export function debounce (func, wait, immediate) {
  let timeout, args, context, timestamp, result

  const later = function () {
    // 据上一次触发时间间隔
    const last = +new Date() - timestamp

    // 上次被包装函数被调用时间间隔 last 小于设定时间间隔 wait
    if (last < wait && last > 0) {
      timeout = setTimeout(later, wait - last)
    } else {
      timeout = null
      // 如果设定为immediate===true，因为开始边界已经调用过了此处无需调用
      if (!immediate) {
        result = func.apply(context, args)
        if (!timeout) context = args = null
      }
    }
  }

  return function (...args) {
    context = this
    timestamp = +new Date()
    const callNow = immediate && !timeout
    // 如果延时不存在，重新设定延时
    if (!timeout) timeout = setTimeout(later, wait)
    if (callNow) {
      result = func.apply(context, args)
      context = args = null
    }

    return result
  }
}

/**
 * This is just a simple version of deep copy
 * Has a lot of edge cases bug
 * If you want to use a perfect deep copy, use lodash's _.cloneDeep
 * @param {Object} source
 * @returns {Object}
 */
export function deepClone (source) {
  if (!source && typeof source !== 'object') {
    throw new Error('error arguments', 'deepClone')
  }
  const targetObj = source.constructor === Array ? [] : {}
  Object.keys(source).forEach(keys => {
    if (source[keys] && typeof source[keys] === 'object') {
      targetObj[keys] = deepClone(source[keys])
    } else {
      targetObj[keys] = source[keys]
    }
  })
  return targetObj
}

/**
 * @param {Array} arr
 * @returns {Array}
 */
export function uniqueArr (arr) {
  return Array.from(new Set(arr))
}

/**
 * @returns {string}
 */
export function createUniqueString () {
  const timestamp = +new Date() + ''
  const randomNum = parseInt((1 + Math.random()) * 65536) + ''
  return (+(randomNum + timestamp)).toString(32)
}

/**
 * Check if an element has a class
 * @param {HTMLElement} elm
 * @param {string} cls
 * @returns {boolean}
 */
export function hasClass (ele, cls) {
  return !!ele.className.match(new RegExp('(\\s|^)' + cls + '(\\s|$)'))
}

/**
 * Add class to element
 * @param {HTMLElement} elm
 * @param {string} cls
 */
export function addClass (ele, cls) {
  if (!hasClass(ele, cls)) ele.className += ' ' + cls
}

/**
 * Remove class from element
 * @param {HTMLElement} elm
 * @param {string} cls
 */
export function removeClass (ele, cls) {
  if (hasClass(ele, cls)) {
    const reg = new RegExp('(\\s|^)' + cls + '(\\s|$)')
    ele.className = ele.className.replace(reg, ' ')
  }
}

/**
 * 判断对象是否为空
 * @param {Object} obj
 */
export function isEmptyObject (obj) {
  for (var key in obj) {
    return false
  }
  return true
}

/**
 * 判断是否是数字
 * @param {Object} value
 */
export function isNumeric (value) {
  return !isNaN(parseFloat(value)) && isFinite(value)
}

/**
 * 提取数字字典
 * @param {string} text
 * @param {string} type string | number
 * @param {string} returnDataType object | array
 * @returns { object | array}
 * @example
 *  上课状态 -1 待上课 0 上课中 1 已结束 2 已取消
 *  结课状态 1，已结课 2，未结课
 */
export function extractDataDict (text, type = 'string', returnDataType = 'object') {
  const data = {}
  let findPattern = /([-\w]+)\s*[:：]\s*([-\w\u2E80-\u9FFF]+)/g // 匹配 【数字字母 + 冒号 + 字符串】的数据结构
  const findState = text.match(findPattern)
  if (!findState || findState.length < 2) { //
    findPattern = /(-?\d+)\s*([^0-9\s]+)\s*/g // 匹配【数字 + 空格 + 非数字】的数据结构
  }
  let match
  while ((match = findPattern.exec(text)) !== null) {
    const value = match[2].trim().replace(/[,，；、:：|]/g, '')
    const key = match[1].trim()
    data[key] = value
  }
  if (returnDataType === 'object') {
    return data
  } else {
    return Object.keys(data).map(key => {
      return {
        value: type === 'number' ? (Number(key) || 0) : key,
        label: data[key]
      }
    })
  }
}

// 获取变量类型，非严谨模式，注意数值型字符串为string类型
export function getVariableType (variable) {
  if (typeof variable === 'string') {
    return 'string'
  } else if (typeof variable === 'number') {
    return 'number'
  } else if (typeof variable === 'boolean') {
    return 'boolean'
  } else if (Array.isArray(variable)) {
    return 'array'
  } else if (typeof variable === 'object' && variable !== null) {
    return 'object'
  } else if (variable === null) {
    return 'null'
  } else if (typeof variable === 'undefined') {
    return 'undefined'
  } else {
    return 'unknown'
  }
}

/**
 * 判断属性值是否有效
 * @param {any} value
 * @return {boolean}
 */
export function isValidValue (value) {
  // 判断属性值是否有效
  return (
    value !== '' &&
    value !== null &&
    value !== undefined &&
    !(Array.isArray(value) && value.length === 0) &&
    !(typeof value === 'object' && Object.keys(value).length === 0)
  )
}

/**
 * 获取组件的初始化属性
 * 包含 _xx_ 格式且具有有效值的属性，及rewriteAttr中的属性
 * @param {Object} compApi
 * @return {Object}
 */
export function _getInitAttrOfComp (compApi) {
  const result = {}
  if (!compApi || !compApi.data) {
    return result
  }
  const data_ = compApi.data.call({ itemSetIns: {} }) || {}
  if (!isEmptyObject(data_) && !isEmptyObject(data_.formData)) {
    const obj = data_.formData
    const rewriteAttr = Array.isArray(data_.rewriteAttr) ? data_.rewriteAttr : []
    for (const key in obj) {
      if (rewriteAttr.includes(key) || (/^_[\w-]+_$/.test(key) && isValidValue(obj[key]))) {
        result[key] = obj[key]
      }
    }
  }
  return result
}

/**
 *  获取自定义组件,根据组件类型
 * @param {string} formItemType
 * @return {Object} 组件对象, 非组件实例，找不到返回 null
 */
export function getCusComptByFormItemType (formItemType) {
  const n_ = 'Set' + (formItemType.charAt(0).toUpperCase() + formItemType.slice(1))
  return _$cusComponents$_[n_] || null
}

/**
 * 判断表单元素是否禁用
 * @param {String} filterStr 过滤字符串 boolean | undefined | RegExp
 * @param {String} mode 模式 (例如：'list', 'form')
 * @returns {Boolean} 是否过滤
 */
export function getFormItemOptsIsDisabled (filterStr, mode = '') {
  // return typeof filterStr === 'undefined' ? false : (typeof filterStr === 'string' ? (new RegExp('^(' + filterStr + ')$').test(mode)) : !!filterStr)
  if (typeof filterStr === 'undefined') { return false }

  if (typeof filterStr === 'string') {
    if (mode === '') {
      return false
    }
    const negate = filterStr.startsWith('!')
    const regexStr = negate ? filterStr.substring(1) : filterStr
    const regex = new RegExp('^(' + regexStr + ')$')
    return negate ? !regex.test(mode) : regex.test(mode)
  }
  return !!filterStr
}

export function getFormItemOpts (formItemOpts, mode = '') {
  return formItemOpts.map(item => {
    return {
      value: item.value,
      label: item.label,
      disabled: getFormItemOptsIsDisabled(item.disabled, mode)
    }
  })
}
